Invention Grant
- Patent Title: Phase-modified quasi-non-diffracting laser beams for high angle laser processing of transparent workpieces
-
Application No.: US17159684Application Date: 2021-01-27
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Publication No.: US11858063B2Publication Date: 2024-01-02
- Inventor: Craig John Mancusi Ungaro
- Applicant: CORNING INCORPORATED
- Applicant Address: US NY Corning
- Assignee: Corning Incorporated
- Current Assignee: Corning Incorporated
- Current Assignee Address: US NY Corning
- Agent Kevin L. Bray
- Main IPC: B23K26/00
- IPC: B23K26/00 ; B23K26/035 ; B23K101/36 ; B23K103/00
Abstract:
A method for processing a transparent workpiece that includes directing a laser beam into the transparent workpiece. A portion of the laser beam directed into the transparent workpiece comprises a laser beam focal line and generates an induced absorption to produce a defect within the transparent workpiece. The laser beam focal line includes a wavelength λ, a spot size wo, a Rayleigh range ZR that is greater than
F
D
π
w
o
2
λ
,
where FD is a value of 10 or greater, and an internal focal line angle of greater than 10°. The laser beam focal line further comprises a circular angular spectrum within the transparent workpiece and a plurality of rays. Each individual ray of the plurality of rays has a same phase, ϕ, when converging to form the circular angular spectrum within the transparent workpiece.
F
D
π
w
o
2
λ
,
where FD is a value of 10 or greater, and an internal focal line angle of greater than 10°. The laser beam focal line further comprises a circular angular spectrum within the transparent workpiece and a plurality of rays. Each individual ray of the plurality of rays has a same phase, ϕ, when converging to form the circular angular spectrum within the transparent workpiece.
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